Synergies

Strategies

Dark Bum can convert any red heart into soul hearts, therefore he is especially useful when playing as ???, Azazel, Eve or any characters that lack enough heart containers. To ordinary characters it is still useful, since in many occasions there are a large number of spare red hearts spawned upon cleaning rooms. Dark Bum is comparatively useless to characters with many heart containers like Magdalene.

The Best Friends Forever item will increase the size of the Dark Bum, but his function remains entirely unchanged.